When a girl is 28 year old and a boy is 26 yoar old so is there any problem with child birth?

Good ages--more2ask. Here are some questions both people in any couple should ask: how healthy am i? What medications do I need? What drugs or toxins can i avoid? How stable is my life? How healthy is my financial state? How mature am i? How committed is our relationship? Do we both want a family now? Are we in a good place? If the answer is not optimal for all, a woman might visit an obgyn before trying to conceive.
No. Marriage a neessity for the sake of the child. This is a normal age for conception.